The Fossil Flats trail is called the birthplace of Arkansas Mountain Biking in 1989. That is the loop that you start and end on. This ride also included Sawmill Loop, All You Can Eat, Racer's Hill, We Can Take, Sparky and Orville. Devil's Den State Park is about an hour south of Bentonville, Arkansas.
Camp Murphy is one of the best trail systems in Florida for jumps, drops, berms and other tech.